# Is acertea ESM-only? Can you require() it?

> acertea@1.1.6 declares a CommonJS entry, but require() fails at runtime. CommonJS on paper — require() failed in our runtime test.

## Description This project is a simple chat application built using Node.js and Socket.io. It allows users to send real-time messages to each other in a chat room.

Last verified Sep 9, 2026 against acertea@1.1.6.

acertea declares a CommonJS entry only, but require("acertea") failed on every Node.js version in our probe: Cannot find module 'express'. import "acertea" resolves to the same file, so it fails the same way. That usually means a missing peer dependency, a browser-only global, or a package that is not meant to be loaded directly; see the runtime table below.

## What to do

1. require("acertea") failed in our probe on every Node.js version (Cannot find module 'express'); check the package README for peer dependencies or setup before relying on it.
2. From ES modules use the default import: import acertea from "acertea"; then destructure. Named imports only work when Node.js can statically detect the exports.
3. TypeScript: no types are available for acertea; declare the module yourself if you need them.

## Facts

- Latest: 1.1.6 (May 27, 2024)
- Module format: CommonJS
- Last CommonJS version: 1.1.6
- TypeScript types: none
- Node engines: not declared
- Weekly downloads: 384
- License: ISC

## Runtime test results for acertea@1.1.6

Installed and executed on Sep 9, 2026 with require("acertea") from a CommonJS file and import "acertea" from an ES module.

| Runtime | require("acertea") | import "acertea" |
|---|---|---|
| Node.js 18 | fails (MODULE_NOT_FOUND) | fails (MODULE_NOT_FOUND) |
| Node.js 20 | fails (MODULE_NOT_FOUND) | fails (MODULE_NOT_FOUND) |
| Node.js 22 | fails (MODULE_NOT_FOUND) | fails (MODULE_NOT_FOUND) |
| Node.js 24 | fails (MODULE_NOT_FOUND) | fails (MODULE_NOT_FOUND) |
| Node.js 26 | fails (MODULE_NOT_FOUND) | fails (MODULE_NOT_FOUND) |
| Bun 1.4.0 | fails (Error) | fails (Error) |

## How to import acertea

ES modules:

```js
import acertea from "acertea";
```

CommonJS:

```js
// require("acertea") failed in our probe on every Node.js version we test (Cannot find module 'express'); see the runtime table.
const acertea = require("acertea");
```

## Module format by version

Derived from the type, main and exports fields of every stable release on npm (2 versions; the newest 2 shown).

| Versions | Format | First published |
|---|---|---|
| 1.1.4 – 1.1.6 | CommonJS | Mar 18, 2024 |

## Frequently asked

**Is acertea ESM-only?**

acertea@1.1.6 declares a CommonJS entry, but require() fails at runtime. acertea declares a CommonJS entry only, but require("acertea") failed on every Node.js version in our probe: Cannot find module 'express'. import "acertea" resolves to the same file, so it fails the same way. That usually means a missing peer dependency, a browser-only global, or a package that is not meant to be loaded directly; see the runtime table below.

**Can I require acertea?**

Not in practice. acertea declares a CommonJS entry, but require("acertea") failed on every Node.js version in our probe: Cannot find module 'express'. Check the package README for peer dependencies or setup before relying on it.

**Can I import acertea with ES module syntax?**

Yes. import acertea from "acertea" works in Node.js and Bun because they support importing CommonJS modules. Named imports work only when Node.js can statically detect the exports.

**Does acertea work in Bun?**

Importing acertea failed in Bun 1.4.0 on Sep 9, 2026: error: Cannot find package 'express' from '/Users/boat/Projects/top-seo/data/probe-work/acertea/node_modules/acertea/index.js'

**Does acertea ship TypeScript types?**

No. acertea ships no type declarations and there is no @types package for it.

## Links

- [acertea on npm](https://www.npmjs.com/package/acertea)
- [Source repository](https://github.com/miftah1231/acertea)
- [HTML version](https://canirequire.com/package/acertea/)
- [JSON version](https://canirequire.com/package/acertea.json)

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